Modelling and theoretical analysis of a novel common mirror based silicon photonic Michelson modulator

Hamdani, Mursal Ayub; Qazi, Gausia

doi:10.1007/s11082-022-04312-4

Cited by 3 publications

(1 citation statement)

References 24 publications

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“…Recent advances in the design and fabrication of photonic integrated circuits have accelerated the use of microring resonators (MRRs) in a variety of applications, including frequency comb generation [1], communication [2,3], sensors [4], optical filters [5], wavelength-division multiplexing [6], quantum computing [7], and so on. Owing to its small footprint, suitability for mass production blue, and greater * Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Grating assisted temperature insensitive micro-ring resonator biosensor

Kumar Verma,

Kumari,

Mani Tripathi

2023

J. Opt.

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A grating-assisted temperature-insensitive micro-ring resonator bio-sensor is reported using finite-difference time domain simulation method. In addition to choosing a negative thermo-optic coefficient material water to nullify temperature-induced wavelength shift, optimization of the opto-geometric parameters provided a precisely zero-temperature sensitivity state of the structure. The negative thermo-optic coefficient of water counterbalances the positive shift in resonance wavelength originating from Si waveguides. The grating structure delocalizes the core field into the analyte region, which enhances field matter interaction to offer high bulk refractive index (RI) and affinity sensing. The advantage of incorporating grating structure in the ring has been demonstrated by comparing the bulk RI sensitivity and affinity sensitivity with and without the grating structure. Without the circular grating array, the bulk RI sensitivity is 214 nm/RIU and the affinity sensitivity is 0.139 nm/nm. Using grating in the ring structure offers an improved bulk RI sensitivity of 525 nm/RIU and an adlayer sensitivity of 0.515 nm/nm. We calculated the system limit of detection of the structure as ∼2×10−6 RIU. The fabrication tolerance of geometrical parameters, in the form of 10% variation in hole radius and 5% variation in other widths of our sensor, reveals a nominal temperature sensitivity of ∼6 pm/◦C. Changing the cladding analyte from pure water to other aqueous solutions, e.g. urine samples, also has a small impact on temperature sensitivity. The present work is useful in RI-dependent monitoring of the constituents present in aqueous medium-based bio-analytes samples in a variable ambient temperature environment.

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